16ozfrozen mixed berries*I used a raspberry, blueberry, strawberry, and blackberry blend
1¼cupsfreshly squeezed lemon juice*6 large lemons
1cupwater
½cupSplenda *regular zero-calorie granulated, or granulated sweetener of choice
2-3cupssparkling water*plus more for serving on the side
ice to fill the glasses
Instructions
In a high-powered blender, blend the frozen berries, fresh lemon juice, 1 cup of water, and Splenda until smooth. *Straining the mixture through a fine mesh sieve after blending is optional. If you're using a powerful blender, it will grind up most of the seeds.
Pour the mixture into a 2-quart pitcher.
Add 2 cups of sparkling water and stir. Taste and add more sparkling water, if needed.
Pour into ice-filled glasses and serve.
Notes
I usually make the drink with 2 cups of sparkling water and serve it with sparkling water bottles on the side. This way, everyone can adjust the taste to their liking.
For a smoother, seed-free texture, strain the blended berry mixture through a fine mesh sieve before adding the sparkling water.
If not serving right away, chill the berry mixture separately from the sparkling water, then combine just before serving to keep it fizzy.